Water-heater.



C. A, BACKSI-ROM.

WATER HEATER.

APPLICATION FILLD JUNE 29, I914. A

1,166,424, I Patk uted Jun. :1, I916.

WITNESSES i To all whom it may concern.

CHARLES A. IBACKSTROM', OF GRAFTON, PENNSYLVANIA, ASSIGNOR T PITTSBURG'WATER HEATER COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF NEWJERSEY.

Be it known that I,'CHARLEs STROM, a citizen of the United States,residing at Grafton, in the county of Allegheny and State ofPennsylvania, have invented new and useful Improvements in lrVater-Heaters, of which the following is a specification.

The invention relates to water heaters, and particularly to that typehaving a vertical coil. The invention has for its primary objects (1)the provision of an improvement involving the use of a baflie of novelconstruction whereby the efliciency of the heater, is materiallyincreased, (2) the provision of a baflle of cheap and simpleconstruction adapted to retard the upward movement of the body of heatedgas at the center of the coil and to direct such body of gas laterallyacross the water carrying coils whereby a maximum heating efi'ect issecured.

One embodiment of the invention is illustrated in the accompanyingdrawing where- 1n:

The figure is a longitudinal section through a heater built inaccordance with my invention.

In the drawings 1 is the casing of the heater and 2 and 3 are concentricvertical sets of coils connected to the inlet header 4 and the outletheader 5. Two sets of coils are illustrated but any number of coilsmight be employed. Beneath the coils is a gas burner 6 which may be ofany improved type. The heated gases escape from the heater through theoutlet flue or passage 7.

Located inside of'the innercoil of the heater is a baflie plate 8 bentinto the form of a spiral and preferably extending substantially fromone end of the coils to the other. The plate is held suspended in placeby means of a wire 9 passing around they coil and through the plate. Theuse of this helical baffle plate I have found to increase the ciiiciencyof the heater about 5 per cent.

as compared' withtheaters provided with other baffles of the mostapproved type as heretofore used in the art. This increase in eiiiciencyis due, first, to the fact that the ,helix forces the heated gases atthecenter of the heater to follow a longer path than Specification ofLetters Patent.

, WATER-HEATER.

A Patented J an. 4., 1916.

Application filed June 19, .1914. Serial No. 846,003.

would otherwise be the case, and second, to the fact that the curves ofthe plate tend to distribute the gases laterally across the water coils.A maximum reduction in the temperature of the heated gases is securedand consequently a maximum heating eflect upon the water in the coils.The pitch of the helical baffle 1 plate. is preferably made relativelysteep, as illustrated, so that the gases will, not be too greatlyretarded in their upward movement, and an that only a portign of thegases will be deflected across the lower turns of the coil; theremaining portion following the baflie plate upward and being deflectedacross the upper 7 turns of the coil. The battle plate can be veryeasily and'cheaply made and applied without difiiculty to substantiallyall types of vertical coilwater heaters. The oregoing and otheradvantages will be readily apparent to those skilled in the art.

It will be understood that by the term vertical coil is meant an uprightcoil in which the turns of the coil are arranged so as to provideasubstantially vertical or upright,-passageway inside the turns of thecoil for the-passage of a current of heated gas, the upright bafileplate in the passage: way under this condition being effective toaccomplish the function of distributing, the ascending heated gaslaterally across the turns of the coil. I a

What I claim is-: In combination in a water heater, a vertical casing, aburner at the lower end thereof, a vertical helical coil in the casingto.permit the passage of gases laterally therebetween, and a helicalbafile plate having a relatively steep pitch extending upward throughthe coil and adapted to retard the upward movement of the gases anddeflect a portion thereof laterally across the turns of the coil. I v

In testimony whereof I have hereunto signed my name in the presence ofthe two subscribed witnesses. i a

(MAKES A. BAOKSTROM. a. 8-]

Witnesses: A I

Jon'N BOURKE, CATHERINE T. BOURKE.

